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CHEMISTRY MCQs

Total Questions : 2589 | Page 52 of 259 pages
Question 511. The filter over which sewage is sprinkled is called as
  1.    Trickling filter
  2.    Percolating filter
  3.    Contact bed
  4.    Intermittent sand filter
 Discuss Question
Answer: Option A. -> Trickling filter
Question 512. An example of major air pollutant is
  1.    Oxygen
  2.    Carbon monoxide
  3.    Helium
  4.    Carbon dioxide
 Discuss Question
Answer: Option B. -> Carbon monoxide
Question 513. Which type of radiations are absorbed by the upper layer of the atmosphere?
  1.    Radio-waves
  2.    Infrared
  3.    Visible
  4.    Ultraviolet
 Discuss Question
Answer: Option D. -> Ultraviolet
Question 514. Sulphur dioxide level in the atmosphere can be reduced by using
  1.    More efficient car engines
  2.    Catalytic converters in industry
  3.    Static electricity to attract it in factory chimneys
  4.    Low - sulphur fuels
 Discuss Question
Answer: Option D. -> Low - sulphur fuels
Question 515. The term 'brown air' is used for
  1.    Acid fumes
  2.    Photochemical smog
  3.    Sulphurous smog
  4.    Industrial smog
 Discuss Question
Answer: Option B. -> Photochemical smog
Question 516. Which one amongst the following is not a Green House gas?
  1.    Nitrogen
  2.    Carbon dioxide
  3.    Carbon Monoxide
  4.    Chloro fluoro carbons
 Discuss Question
Answer: Option A. -> Nitrogen
Question 517. The sewage obtained from water closets and urinals is known as
  1.    Sanitary waste
  2.    Industrial waste
  3.    Garbage
  4.    Sullage
 Discuss Question
Answer: Option A. -> Sanitary waste
Question 518. Which of the following is not a greenhouse gas ?
  1.    Hydrogen
  2.    Carbon dioxide
  3.    Nitric oxide
  4.    Chlorofluorocarbon
 Discuss Question
Answer: Option A. -> Hydrogen
Question 519. Which is abundant in Gobar gas?
  1.    Carbon dioxide
  2.    Methane
  3.    Oxygen
  4.    Hydrogen
 Discuss Question
Answer: Option B. -> Methane
Question 520. The major harmful gas emitted by automobile vehicle which causes air pollution is
  1.    Carbon Monoxide
  2.    Methane
  3.    Carbon dioxide
  4.    Ozone gas
 Discuss Question
Answer: Option A. -> Carbon Monoxide

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